Hanterm-XF Loop-Based Escape Sequence Denial of Service Vulnerability

BID:6944

Info

Hanterm-XF Loop-Based Escape Sequence Denial of Service Vulnerability

Bugtraq ID: 6944
Class: Input Validation Error
CVE: CVE-2003-0079
Remote: No
Local: Yes
Published: Feb 24 2003 12:00AM
Updated: Jul 11 2009 08:06PM
Credit: Discovery of these issues is credited to H D Moore and Digital Defense.
Vulnerable: Redhat hanterm-xf-p19-15.ia64.rpm
+ Redhat Linux 7.2 ia64
 Redhat hanterm-xf-p19-15.i386.rpm
+ Redhat Linux 7.2 i386
 Redhat hanterm-xf-p19-15.i386.rpm
+ Redhat Linux 7.3 i386
 Redhat hanterm-xf-2.0.0-6.i386.rpm
+ Redhat Linux 8.0 i386
 Redhat Enterprise Linux WS 2.1
Redhat Enterprise Linux ES 2.1
Redhat Enterprise Linux AS 2.1 IA64
Redhat Enterprise Linux AS 2.1
Hanterm hanterm-xf 2.0
Not Vulnerable: Redhat hanterm-xf-2.0.5-5.8.0.i386.rpm
+ Redhat Linux 8.0 i386
 Redhat hanterm-xf-2.0.5-5.7.4.ia64.rpm
+ Redhat Linux 7.2 ia64
 Redhat hanterm-xf-2.0.5-5.7.4.i386.rpm
+ Redhat Linux 7.3 i386
 Redhat hanterm-xf-2.0.5-5.7.4.i386.rpm
+ Redhat Linux 7.2 i386

Discussion

Hanterm-XF Loop-Based Escape Sequence Denial of Service Vulnerability

The hanterm-xf terminal fails to sufficiently filter certain potentially malicious loop-based escape sequences, leaving the terminal open to attacks including attacker initiated tight loops that may exhaust CPU resources.

The problem has been reported to result from a lack of sufficient sanitization of potentially malicious escape sequences, which are handled by the DEC UDK processor implementation in the vulnerable terminal.

It is possible to exploit this issue if an attacker can cause malicious escape sequences to be displayed in a terminal window of a vulnerable terminal emulator.

Exploit / POC

Hanterm-XF Loop-Based Escape Sequence Denial of Service Vulnerability

There is no exploit code required.

Solution / Fix

Hanterm-XF Loop-Based Escape Sequence Denial of Service Vulnerability

Solution:
Red Hat has released advisory RHSA-2003:070-01 with fixes to address this issue. Red Hat Enterprise Linux updates are available via the Red Hat Network.


Redhat hanterm-xf-p19-15.ia64.rpm

Redhat hanterm-xf-2.0.0-6.i386.rpm

Redhat hanterm-xf-p19-15.i386.rpm

Redhat hanterm-xf-p19-15.i386.rpm

References

Hanterm-XF Loop-Based Escape Sequence Denial of Service Vulnerability

References:

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